Chart image filenames with HTML export

[vickirk]

Hi,

I'm using the js-export script to extract scheduled reports into a directory where they are then integrated into an external web site by a script.  The problem is the image file names for the charts in teh report don't have a png extension, is there any way I can change the way file names can be specified for charts when doing an HTML export. 

I tried setting the html element id export parameter on the off chance.  I cant see a way to do it.  The fallback option of renaming the files and modifiying the html is straight forward, I'd rather be able to do it in JR/JS though.  Any ideas?

Thanks,Vic